Spray gun



June 16, 1953 E. E. KING 2,6

' SPRAY GUN Filed Jan. 18, 1951 2 Sheets-Sheet i mmvrox,

E. E. KING SPRAY GUN June 16, 1953 Filed Jan. 18, 1951 2 sheets-sheet 2Patented June 16. 1953 l NITED ISPRAY Edward 1:. King,-lLos Angeles,cam. Appllcatlon hnuary 18, 1951, Serial No. 206,668

devised for alleviating this situation the present invention-has beendeveloped to more' efficien'tly and satisfactorily overcome thisproblem.

It is therefore an object of the invention to provide novel and improvedmeans for dusting printed sheets with a powder or other substance whicheffectively prevents smearing of the ink of ing and removingsheets'lprinted by press in, which sheets are deposited' in a stackformation 12 at the end of the press. Apasting 13 @0131- prisesthe-cover of a powder supply tank M and -is formed with a bore l andablock; .16,

the latter having one or more holes :I :l to receive a bracket member 18:b'ywhich the supply tank may be supported from a frame member 13 of theprinting press 1 0. member 1:1 being secured the printed sheets and alsokeeps the sheets from sticking together.

Another object of the inventionis to provide improved apparatus fordusting printed sheets with a substance to prevent smearing, whichapparatus may be readily positioned for operation on existing printingpresses and which apparatus may be adjustable to accommodate to varyingprinting press conditions.

An additional object of the invention is to 4 provide a novel dispersionchamber and nozzle for spraying a powder or other substance onto printedsheets for preventing smearing and sticking of the sheets occasioned bythe fresh Figure 2 is a bottom view of the dispersion chamber and nozzleunit shown in Figure 1.

Figure 3 is a plan view with the top plate removed of the dispersionchamber shown in Figures l and 2.

Figure 4 is a perspective view. of the top of the powder supply tank andthe supporting means for the dispersion chamber.

Figure 5 is a partial sectional view taken along the line 55 of Figure4.

Figure 6 is a sectional view taken along the line 6-6 of Figure 4.

Figure 7 is a perspective'view of one of the spray nozzles shown inFigure 1.

Figure 8 is a sectional view taken along the line 8--8 of Figure 7. p

Figure 1 of the drawing shows a printing press l9 having a conveyermechanism II for receivjto block it by a wing screw 2'0 :or inotherrqu'ivalent manner.

A pipe or tube 2| for the supply of air under pressure is suitablyconnected to one endof bore l5 and a discharge pipe 22 extends from theother end of bore l5 and is connected to a pipe 23 by extending into thesplit threaded end 24 thereof, a clamping nut 25 being so arranged as tocompress end 24 against a sealing ring 26 on the end of pipe 22 wherebyto effect a sealed connection between the two pipes, pipe 23, however,being longitudinally adjustable with respect to pipe 22. A casting l3has a pair of openings 21 which communicate between bore 15 and theinterior of tank I4 and a pair of valves and 29 are provided forcontrolling the flow of air into tank l4 and a supply of air-bornepowder from tank l4 into discharge pipes 22 and 23.

A dispersion chamber 30, generally in the form of a fiat cylinder, issecured to a pipe 23 and has an inlet connection 3| of conventional typeand is formed with a dispersion chamber cavity 32 and has a cover platewhich may be'removed. A plurality of bores 33, 34 and 35 extend throughthe bottom of the chamber 30 and are connected to swivel fittings 36 and3! to which are connected a plurality of nozzle tubes 38 and 39respectively as shown in Figures 1 and 2. Tubes 38 and 39 havedownwardly directed ends 40 to whichare connected nozzles 4 I, eachformed with a concave recess 42 and a plurality of discharge passages 43and 44, the latter being arranged concentrically about the centralpassage 43. A bafile 45 is positioned in cavity 32 to deflect the flow.from pipe 23 and the side walls of the cavity are directed inwardly asshown whereby an even distribution of the dusting powder is directed tobores 33, 34 and 35.

The operation of the invention should be clear from the foregoingdescription. A supply of suitably selected dusting powder is placed intank I4 and a supply of air under pressure connected to pipe or tube 2I. Valves 28 and 23 may besuitably adjusted and upon the operation ofthe printingpress a supply of air-borne powder will be discharged fromeach nozzle 4|. As can be seen in Figure -l,tubes 39 are longer than anddescribed the preferred form of this invention, it is to be understoodthat minor changes" in the details of construction, combination andarrangement of parts may be resorted to without departing from thespirit and scope of the invention as claimed. g

I claim:

1. Dusting apparatus for printed sheets comprising, in combination, atubular supporting arm through which dusting material is caused totravel, a flat cylindrical body having a shallow dispersionchambertherein, a radial inlet to said chamber having an end of saidtubular arm connected therewith for discharge into the chamher, saidbody having a plurality of outlet ports opening from said chamberthrough one flat side of the body, a plurality of nozzle tubes eachhaving one end swivelly'connected in an outlet port and extendingoutwardly from the body, said tubes being disposed in a common planeparallel with said one flat side of the body and swingable in said planeto extend in different directions from. the body, and a downwardlydirected discharge nozzle carried upon the outer end of each tube.

2. The invention according to claim '1, wherein said flat body has anoutlet port at the axial center thereof, a swivel coupling in saidcenter port, a pair of oppositely extending nozzle tubes carried by thecentral swivel coupling to turn ,as a unit with the coupling, and anozzle upon the outer end of each of the last named tubes.

3. The invention according to claim 2, wherein the first named outletports are arranged in a circle around said center port and wherein thefirst named nozzle tubes are of greater length than the said pair ofoppositely extending nozzle tubes.

EDWARD E. KING.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 2,041,627 Thompson May 19, 1936 2,105,275 Thompson Jan. 11,1938 2,123,537 Marr July 12, 1938 2,339,899 Wilson Jan. 25, 19442,496,194 Bennett Jan. 31, 1950

